Supplier Page from Thermo Fisher Scientific for Niobium slug, 6.35mm (0.25in) dia x 12.7mm (0.50in) length, 99.95% (metals basis excluding Ta)
2-Ethoxybenzamide, 97% from Thermo Fisher Scientific
Ethyl acrylate, 99.5%, stabilized from Thermo Fisher Scientific
Ethyl chloroacetate, 99% from Thermo Fisher Scientific
Ethylmercurithiosalicylic acid, sodium salt, 97.0-101.0% from Thermo Fisher Scientific